Black Box Analog Design is a boutique American manufacturer of hand-built tube studio gear, founded by mixer/producer Eric Racy and engineer Robert Wainscott. The company grew out of studio work, with its founders developing custom analog circuits to solve specific mixing and mastering problems rather than cloning vintage designs.

The brand is best known for the HG-2, a stereo tube processor aimed at the mix bus that adds harmonic saturation, natural compression, and perceived loudness, and has been widely adopted by professional mixing and mastering engineers. It was followed by the HG-Q, a 3U hardware tube equalizer and saturator that pairs an all-analog signal path with digital recall. Software versions of both units — the HG-2 Plugin, HG-2MS (mid-side) Plugin, and HG-Q Plugin — are distributed through Plugin Alliance in partnership with Brainworx.

The company has built a reputation among top-tier mix engineers for gear that is more about tonal enhancement than transparent signal processing, with endorsements from engineers such as Dave Pensado.

Black Box Analog Design has 1 product cataloged on Equipboard, including Effects Processors. Their gear is featured by 6 artists, with the strongest followings in Electronic, Pop, and Rock. Notable users include Richard Devine, Wayne Sermon, and Dave Pensado.